Locomotive-boiler furnace.



J. P. NEFF.

LOCOMOTIVE BOILER FURNACE.

APPLICATION FILED MAY 25. 1907. hwa wla Patented May 4,1915.

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LOCOMOTIVE BOILER FURNACE.

APPLICATION FILED MAY25. I907. l lwfimo Patented May 4, 1915.

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JOHN P. Nnrr, or East! onanon, NEW JERSEY, ASSIGNOR, BY mnsnn Assrcnmnnrs,

r0 AMERICAN ARCH comrnnx, or new xonx, N. Y., A conronnrron or DELA- -WARE.

LOCOMOTIVE-BOILER FURNACE.

Specification of Letters l atent.

Patented May 4 1915.

- Application filed may 25, 1907. Serial No. 375,627.

Jersey, have invented certain new and use ful Improvements in Locomotive Boiler Furnaces, of which the following is a full, clear, and exact description, such as will enable others skilled in the artto which it ap pertains to make and use the same.

My invention relates to improvements in locomotive boiler furnaces and has particular reference to improvements in arches for such furnaces. Its object is to improve the operation of locomotive boiler furnaces; and particularly to increase the efliciency and the durability of the front arches or bafiles of such furnaces or fireboxes.

The special purposes of my invention are, to more surely and to a greater extent hold back or retard the products of combustion, including the solids, which rise from the fire ;to more-certainly and effectively admix the combustibles while in the fire chamber and before they rise into the combustion chamber of the firebox; and, to insure better combustion and a more uniform distribution of the heat throughout the firebox. Further objects and results of my invention will appear hereinafter.

The principle of my invention and the best mode of applying the same and the nature and-the details of the invention as distinguished from others will be clearly understood upon reference to the accom- 5 is a detailed longitudinal section, on the line VV of Fig. 2.

The drawings disclose a firebox or furnace proper, contained within a locomotive boiler and surrounded by the usual water legs-or spaces. As therein shown, 5, is, the

crown sheet of the firebox';-6, is the rear sheet, containinga door opening 6";-7, 7,

are the side sheets ;-,3, ,is the ;flue sheet.

The fines, fl, as usual, are secured in and lead forward from the flue sheet. The bottom of the firebox contains a fuel grate 2. As best shown in Fig. 1, Iinterpose an upwardly and rearwardly inclined front arch or baffle between the flues, 4, and the bottom of the firebox, the same dividing the firebox into a fire chamber, A, and a combustion chamber, B. An arch, thus positioned, bafiies and prevents the dii'ect flow of the products of combustion from the grate, 2, to the fiues, 4. In constructing my, novel refractory arch I employ a plurality of longitudinal water circulating arch tubes, 8, and a number of refractory bricks, 9, 10, and, 11, supported by said tubes, 8. The arch tubes extend upwardly and rearwardly, preferably from the lower part of the flue sheet, 3, to the upper part of the rear sheet, joining the front and rear water legs of the boiler. In that formof my invention which is depicted in the drawings, there are four longitudinal inclined arch tubes, 8, and five longitudinal rows of refractory bricks, said longitudinal rows corresponding to the spaces defined by said tubes. I thus form a substantlally imperforate, inclined arch or bafiie which extends, preferably, from side to side of the firebox and which rises to lodge onthe top of the arch may pass back.

into the fire chamber.

The proportions, joints, andrelations of the typical bricks, 9, 10, 11, are clearly disclosed in Figs. 2, 3 and 4; and, except as to the particular features and functions herein set forth, are fully defined in LettersiPatent of the United States No. 9%,494. My invention is not specially concerned with such details but instead has to .do with the form and Operation of the bottoms of locomotivefurnace arches, and is especially directed to the improvement of the large units or bricks which characterize arches that possess the general advantages described in aforesaid patent. In. conformity with the best prior practice, I prefer that the top-of my arch shall be substantially smooth, that is, offer few ifany obstructions to the passage of either the solids or the gases of cumbustion. But, contrary to p'rior practices, I do not use arch bricks that have smooth bottoms. Instead, I roughen or corrugate the bottom of the arch in such manby providing the bricks, 9, and, 10, with' relatively deep pits or recesses, a," and, preferably, similar pits or recesses are provided in the marginal portions of the arch bottom by providing a number of transverse ribs or projections, 11,'upon the bottoms of the bricks, 11.

The many transverse portions, 03, having preferably inclined under or inner surfaces, 6, c, and also the sides, 11", of the ribs, 11, constitute effectiveobstructions to the longitudinal'flow of the products of combustion beneath the arch, and the lateral ends of the pits or recesses and also the sides of the tubes, 8, efiectively baffle 1 or obstruct the transverse movements of the products. Also, the cells or pits, in themselves, tend to retard and divert the products. The" cells, pits, recesses, or cavities here shown in my novel arch, though arranged in both longitudinal and transverse rows, are separate and distinct and do not communicate, being open" only at the bottom. As best shown'in Fig. 3, the bottom of the arch is longitudinally channeled, the tubes, 8 forming the lower sides of such channels. As the products rise beneath the arch they are divided or distributed into longitudinal streams by these channels, and, While traversing the grooves or channels, the products are retarded and the streams are effectually broken up by the corrugated, pitted or recessedtops of .such

channels. Thus the products of combustion, meanin all which. rise from the bottom of the fire ox, are retarded andthoroughly distributed, deflected and admixed, many of the solids, such as cinders, being thrown back upon the grate. Such arches are strong,

--durable and dependable, and are much lighter than-arches of the kind shown in 55 aforesaid patent, and much more eflicient, greatly improving the operation andpcrformance of the locomotive boiler furnaces which'contain them.

Where a rear arch, such as the arch, 13, (Figs. 1 and 2) is required in the firebox, .I provide the same with distinct, non-communicating pits or recesses,e, and deflecting surfaces, 6', like those of the above described front arch.

Having thus described my invention I claim as new and desire to secure by Letters Patent: v

1. A locomotiveboiler and its contained firebox and flues, in combination with a substantially imperforate arch interposed between said flues and the bottom of the fire-r box, said arch comprising a plurality ofupwardly and rearwardlyjnclined longitudinal water circulating tubes and refractory bricks supported thereby, the bottoms of said bricks togetherwithsaid tubes forming a plurality of longitudinal channels that divide the products of combustion into longitudinal streams and the tops of said channels containing many distinct non-communi eating cells or recesses which retard the products of combustion and break up said streams.

2. A locomotive boiler and its contained I firebox and flues,*in combination with a substantially imperforate arch interposed between said flues and the bottom of the fire box and extending from side to side thereof,

. tard the products of combustion and break up said streams.

3. A locomotive boiler and its contained firebox andfluesfin combination with a plu-. rality of inclined longitudinal arch tubes, in said firebox, aplurality of transverse and longitudinal rows of refractory bricks'supported by said tubes, the bottoms of said bricks together with said tubes "forming-a plurality of longitudinal channels that divide the products of combustion into longitudinal streams, and the bottoms. of said brickscontaim'ng corresponding rows of 're- 1 cesses and projections-that retard the products of combustion and break up said streams.

4. A locomotive boiler and its contained firebox and flues,'in combination'withan upwardly and rearwardly inclined arch interposed between said flues and the bottom of the firebox and comprising a number of longitudinal water circulating tubes and a plurality of longitudinal rows of refracto bricks supported by said tubes, the bottomsv of said bricks together containing a plural.- ity of transverse and longitudinal rowsof distinct non-communicating recesses which retard the products of combustion and break up the longitudinal and transverse streams thereof. 5. A locomotive boiler and its contained water circulating tubes and refractory bricks supported thereby, the bottoms of said bricks to ether with said tubes forming a plurality of longitudinal channels that divide the products of combustion into longitudinal streams and the tops of said channels being corrugated and acting to retard said prod-.

nets and break up said streams.

6. A locomotive boiler and its contained firebox and flues, in combination with a substantially imperforate refractory brick arch interposed between the flues and the bottom of the firebox, the bottom of the arch presenting a plurality of longitudinal channels which divide the products into longitudinal streams and the tops of said channels containing rows of distinct non-communicating recesses presenting obstructions adapted to retard said products and breakup said,

streams.

7. A locomotive boiler and its contained firebox and flues, in combination with a substantially imperforate refractory arch interposed between the flues and the bottom of the firebox, the bottom of said arch being formed to divide the products of combustion into longitudinal streams and containing a plurality of longitudinal rows of distinct non-communicating recesses ada ted to retard said products and brea up said streams.

8. A locomotive boiler and its contained firebox and fiues, in combination with a substantially perforate refractolg brick arch interposed between the flues an the bottom of the firebox, the bottom of the arch presenting a plurality of longitudinal channels which divide the products into longitudinal streams and the tops of said channels being formed with obstructions adapted to retard said products and break up said streams.

9. 'A locomotive boiler and its contained firebox and flues, in combination with a refractory brick arch interposed between the fines and the bottom of the firebox, the bottoms of the bricks together containing a plurality of transversely spaced longitudinal rows of distinct non-communicating recesses separated by transverse and longitudinal deflecting walls and adapted to retard the products of combustion and break up the longitudinal and transverse streams thereof.

10. A locomotive boiler and its contained firebox and fines, in combination with a substantially imperforate refractory brick arch interposed between the flues' and the bottom of the firebox, the bottoms of the bricks together containing a plurality of transversely spaced longitudinal rows of recesses and being thus adapted to retard the products of combustion and break up the streams thereof.

In testimony whereof, I have hereunto set my hand this 17th day of May, 1907, in the presence of two subscribing-witnesses.

JOHN P. NEFF Witnesses:

F. G. KNIGHT, JOHN R. Lnrnvnn. 

